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Physics
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Physics
Page 45
1. A jet plane flies in the air because
May 6, 2022
Physics
(a) The gravity does not act on bodies moving with high speeds (b) The thrust of the...
If g is the acceleration due to gravity on the earth’s surface, the gain in the potential energy of an object of mass m raised from the surface of earth to a height equal to the radius of the earth R, is
May 6, 2022
Physics
(a) 1/2 mgR (b) 2 mgR (c) ...
20. A body is in pure rotation. The linear speed v of a particle, the distance r of the particle from the axis and angular velocity ω of the body are related as ω=v/r , thus
May 6, 2022
Physics
(a) ω∝ 1/r (b) ω∝r (c) ω=0 (d) ω is independent of r Ans. d (6)
19. Two particles having mass ‘M’ and ‘m’ are moving in circular paths having radii R and r. If their time periods are same then the ratio of their angular velocities will be
May 6, 2022
Physics
(a) r/R (b) R/r (c) 1 (d) √R/r Ans. c (11)
18. A particle B is moving in a circle of radius a with a uniform speed u. C is the centre of the circle and AB is diameter. The angular velocity of B about A and C are in the ratio
May 6, 2022
Physics
(a) 1 : 1 (b) 1 : 2 (c) 2 : 1 (d) 4 : 1...
17. A wheel is rotating at 900 r.p.m. about its axis. When the power is cut-off, it comes to rest in 1 minute. The angular retardation in radian/s2 is
May 6, 2022
Physics
(a) π/2 (b) π/4 (c) π/6 (d) π/8 Ans. a (6)
16. A car is moving at a speed of 72 km/hr. the diameter of its wheels is 0.5 m. If the wheels are stopped in 20 rotations by applying brakes, then angular retardation produced by the brakes is
May 6, 2022
Physics
(a) – 25.5 rad/s2 (b) – 29.5 rad/s2 (c) – 33.5 rad/s2 (d) – 45.5 rad/s2 Ans. a (11)
15. A flywheel gains a speed of 540 r.p.m. in 6 sec. Its angular acceleration will be
May 6, 2022
Physics
(a) 3 pi rad/sec2 (b) 9 pi rad/sec2 (c) 18 pi rad/sec2 (d) 54 pi rad/sec2 Ans. a (52)
13. In rotational motion of a rigid body, all particle move with
May 3, 2022
Physics
(a) Same linear and angular velocity (b) Same linear and different angular velocity (c) With different linear velocities and same...
12. Two particles of masses 1 kg and 3 kg move towards each other under their mutual force of attraction. No other force acts on them. When the relative velocity of approach of the two particles is 2m/s, their centre of mass has a velocity of 0.5 m/s. When the relative velocity of approach becomes 3 m/s, the velocity of the centre of mass is
May 3, 2022
Physics
(a) 0.5 m/s (b) 0.75 m/s (c) 1.25 m/s (d) Zero Ans.a (12)
11. Three identical spheres, each of mass 1 kg are placed touching each other with their centres on a straight line. Their centres are marked K, L and M respectively. The distance of centre of mass of the system from K is
May 3, 2022
Physics
(a) (KL+KM+LM)/3 (b) (KL+KM)/3 (C) (KL+LM)/3 (d) (KM+LM)/3 Ans. b (36)
MCQ ON PHYSICS FOR CLASS 12 WITH ANSWERS
Apr 15, 2022
Physics
Click Here (44)
MCQ ON PHYSICS CLASS 12 CHAPTER 1
Apr 15, 2022
Physics
https://flameinstitute.com/courses/motion-in-one-dimension/ (48)
MCQ ON PHYSICS OF TABLET COMPRESSION
Apr 15, 2022
Physics
https://flameinstitute.com/courses/motion-in-one-dimension/ (130)
MCQ ON PHYSICS CLASS 10 ICSE
Apr 15, 2022
Physics
https://flameinstitute.com/courses/motion-in-one-dimension/ (38)
MCQ ON PHYSICS CLASS 12
Apr 15, 2022
Physics
https://flameinstitute.com/courses/motion-in-one-dimension/ (52)
MCQ ON PHYSICS FOR COMPETITIVE EXAMS PDF
Apr 15, 2022
Physics
https://flameinstitute.com/courses/motion-in-one-dimension/ (31)
MCQ ON PHYSICS CLASS 9
Apr 15, 2022
Physics
https://flameinstitute.com/courses/motion-in-one-dimension/ (37)
MCQ ON PHYSICS CLASS 10
Apr 15, 2022
Physics
https://flameinstitute.com/courses/motion-in-one-dimension/ (49)
MCQ ON PHYSICS CLASS 11
Apr 15, 2022
Physics
https://flameinstitute.com/courses/motion-in-one-dimension/ (42)
MCQ ON PHYSICS FOR COMPETITIVE EXAMS
Apr 15, 2022
Physics
https://flameinstitute.com/courses/motion-in-one-dimension/ (28)
1. A Body moves 6 m north. 8 m east and 10m vertically upwards, what is its resultant displacement from initial position
Mar 10, 2022
Physics
Explanation (8)
Universe Physics MCQ
Feb 14, 2022
Physics
A planet of mass M has a satellite of mass m, revolving around the planet in a circular orbit of...
Universe Physics
Feb 14, 2022
Physics
Universe is the limitless expanse of space around us consisting of solar system. star, galaxies etc. Solar System ...
Solids and semiconductor device
Feb 14, 2022
Physics
The energy of an electron in an isolated atom is decided by the orbit in which it is revolving. In...
Gravitation Questions
Feb 14, 2022
Physics
Newton’s Law of Gravitation 1. The tidal waves in the sea are primarily due to (a) The gravitational...
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